<template>
	<view class="login-container">
		<!-- 登录提示图标 -->
		<uni-icons type="contact-filled" size="100" color="#afafaf"></uni-icons>
		<!-- 登录按钮 -->
		<button type="primary" class="btn-login" open-type="getUserInfo" @getuserinfo="getUserInfo">一键登录</button>
		<!-- 登录提示 -->
		<view class="tips-text">
			登录后尽享更多权益
		</view>
		
	</view>
</template>

<script>
	import { mapMutations, mapState } from 'vuex'
	export default {
		name:"my-login",
		data() {
			return {
				
			};
		},
		computed:{
			...mapState('m_user', ['redirectInfo'])
		},
			
		methods:{
			...mapMutations('m_user', ['updataUserInfo','updateToken', 'updateRedirectInfo']),
			// 用户授权后，获取用户基本信息
			getUserInfo(e){
				// 判断是否授权获取信息
				if(e.detail.errMsg === 'getUserInfo:fail auth deny') return uni.$showMsg('您取消了登录授权')

				console.log(e.detail)
				// 用户信息保存到vuex
				this.updataUserInfo(e.detail.userInfo)
				this.getToken(e.detail)
			},
			
			// 调用登录接口，获取永久的token
			async getToken(info){
				// 调用微信登录接口，获取code
				const [err, res] = await uni.login().catch(err => err)
				
				// 判断是否登录失败
				if(err || res.errMsg !== 'login:ok') return uni.$showMsg('登录失败')
				console.log(res.code)
				// 准备参数对象
				const query = {
					code: res.code,
					encryptedData: info.encryptedData,
					iv: info.iv,
					rawData: info.rawData,
					signature: info.signature
				}
				console.log(query)
				
				const {data:loginResult} = await uni.$http.post('/api/public/v1/users/wxlogin', query)
				console.log(loginResult)
				if(loginResult.meta.status !== 200) return uni.$showMsg('登录失败')
				uni.$showMsg('登录成功')
				// 保存token到vuex
				this.updateToken(loginResult.message.token)
				// 登录成功后跳转回原来页面
				this.navigateBack()
			},
			
			// 返回登录之前的页面
			navigateBack(){
				// redirectInfo部位null，并且导航方式为 switchTab
				if(this.redircetInfo && this.redircetInfo.openType === 'switchTab'){
					// 调用switchTab方法，进行页面的导航
					uni.switchTab({
						url: this.redircetInfo.from,
						// 导航充公之后吧vuex中的redirectInfo重置为null
						complete: () => {
							this.updateRedirectInfo(null)
						}
					})
				}
			}
		}
	}
</script>

<style lang="scss">
	page{
		background-color: white;
	}
.login-container{
	height: 750rpx;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	background-color: #f8f8f8;
	position: relative;
	overflow: hidden;
	
	&::after{
		content: '';
		display: block;
		width: 100%;
		height: 40px;
		background-color: white;
		position: absolute;
		bottom: 0;
		left: 0;
		border-radius: 100%;
		transform: translateY(50%);
	}
	.btn-login{
		width: 90%;
		border-radius: 100px;
		margin: 15px 0;
		background-color: #c00000;
	}
	.tips-text{
		font-size: 12px;
		color: gray;
	}
}
</style>